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W. E. 8v D. E. DOOLITTLE. MACHINE POR PUTTING NUTS 0N BOLTS. No. 280,298. Patented June 26, 1888 lmlnwm I Q lmllllnlnumm IlIllIIlIlIIMMEMMIIIIIIIIIIIIIQMMHIIIIH lllllllllllllllllVl?mi 1 l |l ulmlmnh I ilinl l iM. @IIIIIIIQJJIQQMIIIIW @Gilllllnmuuuiwww .um IHIIIIIIIHIIIIII i FUIIIIIIY Q, MIIIIUW l lHllll ful 1 li.' :Mmmm W 1, IIIIIIINIIHIIINILU.MIN.n D fh II Higi (D im .l l -vw fr' I` www m Il ,f1/Ww w Q JWM @wwf 5 Sheets-#Sheet 2.

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W. E. 8v D. E. DOOLITTLE. MACHINE POR PUTTING NUTSVON BULTS. No. 280,298.. Patented June 26, 1883.

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` (No Model.) 5 sheetssheet 3.

W. E. & D. E. DOOLITTLB.

MACHINE FOR PUTTING NUTS 0N BOLTS. N-o. 280,298. Patented June 26, 1883.

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(No Model.) 5 sheetssheet 4.

W. E. 8v' D. E. DOOLITTLE.

I MAGHINRPOR PUTTING NUTS 0N BOLTS. No. 280,298. Patented June 26, 1883.

(No Model.) 5 Sheets-Sheet.

W. E. su' D. B. DOOLITTLB. MAGHINRFOR PUTTING NUTS 0N BOLTS. No. 280,298. Patented June 26, 1883.

. UNITED .STATES PATENT OFFICE.,

WILLIAM E. DOOLITTLE AND D.u EDWARD DOOLITTLE, OF NEW BRITAIN,

, CONNECTICUT, ASSIGNORS TO THE RUSSELL & ERVVIN MANUFACTURING` COMPANY, OF SAME PLACE.

MACHINE FOR PUTTING NUTS N BOLTS.

SPECIFICATION forming partof' Letters Patent No. 280,298, dated June 26, 1883.r Application tiled January 3Q, 1883. (No model.)

To all whom it may concern.-

Be it known that we, WILLIAM E. DooLIT- TLE and D. EDWARD DooLITTLE, both of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Machines for Putting Nuts on Bolts, of which the following is aspeeication.

Our invention relates to automatic machinery for screwing nuts upon bolts and the objects of our invention are to so simplify the machine that itvwi-ll be certain in its opera-` tion,- will perform the work expeditiously, and will be an easy machine to keep in repair. Ve attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure l is a plan view of 'our machine. Fig. 2 is a front elevation thereof. Fig. 3 is a sectional elevation thereof on line :I: x of Fig. 2. Fig. 4 is a vertical section of detached parts 011 a line through the middle of the hopper. Fig. 5 is a central vertical section, partly in elevation, of the nut and bolt holding devices. Fig. 6 is an end view of the nutholder. Fig. 7 is asectional elevation of parts of the machine, the plane of section being indicated by the line y, Fig. 2, and Fig. 8 is a like view of some of said parts represented in a different position.

- A designates the main shaft, having a pulley, B, for the application of the driving-belt, and in or on the end of said shaft we form the bolt-holder C. As shown in the drawings, said bolt-holder is specially adapted for holding and driving stove-bolts,7 which have a tapering andslotted head like a common Woodscrew; and it consists of a conical cavity, a, Fig. 5, slotted transversely, and a spring screw-driver, b, the end of which lies in the transverse slot and enters the conical cavity a. When the head of a stove-bolt is forced into said cavity it is` centered by the conical walls, and the screw-driver enters the slot in the bolt-head, and thereby drives the bolt when the bolt-holder is rotated. For bolts which have no rslot in their head-like tireboltsf-a plain conical cavity will ordinarily drive the bolt into its nut; but, if desired,

the bolt-holder may be split through the coni- 5 cal cavity and one or bothsides be hung 011 a hinge, and be acted upon by a spring to force the walls of the cavity and bolt-head together with sufficient friction to make the bolt revolve. The bolt holder will of course be 5 changed to adapt it to whatever kind of bolt it may be desired to hold and drive.

Upon the outer end of the main shaft A is a pinion, d, which meshes into gear-wheel D upon the cam-shaft E, for driving said shaft. 6| A side cam, F, on said shaft acts upon the arm or stud e, Fig. l, of the frame f to force it to the left. Said frame f has attached to its lower end a sliding shaft, G, which acts as a guide to steady the movement of said frame; and at the upper 6g end there is another sliding shaft, II, the inner end of which carries 'the nut-holder I. The shaft H is adjustable lengthwise in the upper end of said frame. The cam F drives the frame and the shafts G H in one direction- 7( backward-with a positive movement, and the spring g draws them in the opposite direction-that is, toward the bolt-holder. The shaft II is in longitudinal alignment with the main shaft A. The nut-holder has a flat upper surface, (see Fig. 6,) and the nut-rcceivy ing recess at its end is open at the top and front. Springs 71. are arranged to take over the front of the nut upon two opposite oorners, to prevent it from falling out prcma- 8c turely. The nut-holder `is bored longitudinally and contains a spring-pressed follower, t', Fig. 5. vA pin, 3, working in a slot, as shown in Fig. 5, or any other suitable stop, prevents the follower from being pressed outward so far as to prevent the nuts from dropping from above down into the nut-receiving recess. A nut, 4, and bolt 5 are represented as within their respective holders in Fig. 5. The nuts are fed into the holder from the hop- 9o per J through the chute K. Y In the bottom of thehopper J is a rocker, L, having a groove, k, in its periphery, and a slot, Z, which eX- tends through its middle from top to bottom, as shown in Fig. 4. Said rocker is mounted up on the crank -shaft M, and is driven by springpitman m and crank-shaft N, the latter being connected by belt O with the cam-shaft E.

The spring-pitman is designed to give and prevent breakage in case any of the parts become clogged.' Upon the front and rear sides of the hopper downwardly-projecting lugs or pieces p 1) are placed, which extend into the groove 7c of the rocker L and prevent the nuts from working out. The slot through the hopper is of such a size as that the nuts will pass through it, and their entry and passage through said slot into the chute K are facilitated bythe rocking movement of the rocker L. When the nut-holder I is forced clear back under the action of the cam F, it is brought with its upper open side directly under the end of the chute, so that the bottom nut falls into it.

kfalling out of the chute.

Th cam then gets out of the way, and the spring g forces the nut-holder forward. The solid ilat upper face of the holder passes nnder the end of the chute, and the bottom nut rests upon said fiat upper face, so that no more nuts can pass through the chute until the nutholder returns. A guard, q, Fig. 2, prevents the nut from working up out of the holder.

Back of the nut-chute is a chute, P, through which the bolts are fed. We have not shown any mechanism for supplying said chute with bolts; but we intend to apply automatic mechanism for so doing, which mechanism will be substantially the same as that now used in screw and bolt machinery for feeding screws or bolts from a pan or hopper into a chute. Below this chute for the bolts is a bolt-carrier, R, mounted upon the rocker-arm S of the shaft T. The spring o has a tendency to hold this carrier toward the front. A downwardly-projecting arm or lever, U, attached to the shaft T, bears against the face of the cam V on the cam-shaft E, the spring o having a tendency to force said lever toward the cam, while the cam drives the lever U and bolt-carrier R in the opposite direction from that in which the spring exerts its force. The bolt-carrier has a fixed jaw, s, the upper surface of which is substantially concentric with the shaft T, and at the rear end of said jaw is a projection, u, which, in connection with the back of the chute P, acts as a stop to limit the forward movement of the bolt-carrier. The set-screw fv renders this stop adjustable. The other` member of the bolt-carrier is a hinged jaw, lw, p ressed upon by a spring, l. lts front end has an upwardly-projecting lip, 2, that engages the front side of the chute P at its lower end, when the bolt-carrier is clear back, and forces the springpressed jaw a back to open the bolt-carrier, as shown in Fig. 8, so that the bottom bolt in the chute P may fall into the jaws of the carrier. So soon as the camV ceases to hold the bolt-carrier back the spring r begins to draw it forward and the spring-pressed jaw closes upon the bolt, while the concentric upper face of the fixed jaw s prevents more bolts from The bolt-carrier is stopped when the bolt is in longitudinal alignment with the nut and bolt holders. When the nut-holder `advances with the nut in it far enough to engage the bolt, the pointed end of the latter is entered within the hole in the nut, and the bolt is then forced endwise into the bolt-holder C. About the same time that the bolt is thus firmly caught and begins to rotate with the bolt-holder C, the cam V forces the bolt-carrier backward to receive another bolt, the spring-pressed jaw allowing the carrier to release its hold upon the bolt last conveyed forward. The concentric face on the edge of the cam V holds the carrier back out of the way until the shaft A and bolt-holder G screw the bolt into the nut as far as is desired. This will generally be such a distance that the pointed end of the bolt will project somewhat throughY the nut, and consequently the said end strikes against the spring-pressed followerzfand forces it inward, as shown in Fig. 5. The cam F then acts to withdraw the nut-holder and the boltcarrier comes forward with another bolt. The spring-pressed follower, which is more powerful than the springs h., will then push the nut and bolt forward out of the holder. ln case the bolt and nut, for any reason, hang in the nutholder7 the next approach of the bolt-carrie).l will knock them out. The farther the bolt is screwed through the nut the more effective will the spring-follower be in discharging the nuts. When another bolt comes forward into position, the nut-holder again advances with another nut, and the operation is repeated indefinitely.

The nut-holder is provided with a slot, G, on its rear side,so that in case there should be no nut in the nut-holder as the bolt comes forward it will not be held forward upon the return of the bolt carrier, but may pass backward through the slot `6,and thus it will remain in. the carrier until the nut-holder is supplied with a nut.

The nut hopper and chute are made adjustable longitudinally with the machine, which, with the adjustment of the shaft H in the frame f, will adapt the machine for operating upon bolts of different lengths. j

XVe are aware that a prior patent for a nnt- 'tapping machine shows a nut-holder having a nut-receiving recess and a hollow springpressed follower for acting upon the broad side of the nut near its edges and outside of its central orifice to discharge the nut from the nutholder, and the same is hereby disclaimed.

We claim as our inventionl. The bolt holder and vdriver having the conical cavity for receiving the bolt-head, substantially as described, and for the purpose specied. i

2. The bolt holder and driver having the conical cavity slotted transversely, and the spring screw-driver which extends through the slot into the conical cavity, substantially as described, and for the purpose specified.

3. In a bolt-nutting machine, the combination of the bolt-holder, the nut-holder having the nut-receiving recess, and the spring-pressed follower, whose outer end is centrally located IOO IIO

(XUA

with reference to the hole in the nut while in I 10. The combination of the main shaft, bear-` the nut-holder, and is adapted for acting upon the end of the bolt, substantially as described, and for the purpose speciicd.

4. The combination of the nut-chute, the nut-holder, and mechanism for reciprocating the nut-holder longitudinally under the end of the nut-chute, substantially as described, and for the purpose specified.

5. The combination of the nut-hopper, the nut-chute, the rocker slotted through from top to bottom and placed between said y-hopper and chute, and mechanism for oscillating the said rocker, substantially as described, and for the purpose speciiied. y

6. The combination of nut-hopper, the rocker at the bottom thereof, mounted upon the crankshaft M, the driving crank-shaft N and the spring-pitman for connecting the cranks of said shafts, substantially as described, and for the purpose specified.

7. The combination of the nut-chute, the oscillating rocker having the slot Z, and the pe ripheral groove k, the nut-hopper, and the pieces p, which extend into the groove k, substantially as described, and forthe purpose specified.

8. The combination of the bolt-chute P, the oscillating rocker-arm S, mounted to-reciprocate directly underneath the end of said chute, mechanism for reciprocating Said arm, and the bolt-carrier R, mounted upon the upper end of the rocker-arm S, and having the upper surface of one of its jaws acting to hold the -bolts in the chute while the jaws of the carrier are moving a bolt forward, substantially as described, and for the purpose. specified.

9. The combination ofthe bolt-chute l), the bolt-carrier R, having jaws s lw, the latter having the lip 2, adapted to receive a single bolt direct fromtlie mouth of the bolt-chutethe spring 7, and the mechanism for moving the jaws back and forth under the end of the chute, substantially as described, and for the purpose specied.

ing the bolt-holder, the; longitudinally-sliding shaft H, bearing the nut-holder in longitudinal alignment with the main shaft, and mech- -anism connected with the main shaft for reciprocating the shaft H, substantially as described, and for th'e purpose specified.

11. The combination of the nut-chute, the nut-holder, mechanism for reciprocating said holder under the chute, the main shaft bearing the bolt-holder, the bolt-carrier having jaws, one of which is spi'ingpressed, mechan ism for moving the jaws to carry the bolt into longitudinal alignment with the nut and bolt holders, and mechanism for withdrawing the jaws from the bolt vwhile it is held between the nut and bolt holders, substantially as described, and for the purpose specified.

12. The combination of the nut-chute K, the

' shaft H, bearing the nut-holder I, the cam F, for positively drawing back the nut-holder,

and the spring for drawing it forward or to ward the bolt holder, substantially as described, and for the purpose specified.

13. `The combination of the main shaft A,

bearing the bolt-holder, the cam-shaft E and connecting gearing between it and-the main shaft, the cam F, arm f, shaft H, bearing nut` holder l,the cam V, the bolt-carrier actuated in one direction by said cam V, and the springs g and o', substantially as described, and for the purpose specified.

14. Y The combination of the bolt-holder C, the nut hopper and chute, made adjustable from side to side, the vnut-holder mounted upon the shaft H, and the reciprocating framef,

connected with said shaft by an adjustable connection, substantially asdescribed, and for the purpose specified.

Wlli. E. DOOLITTLE. j j D. EDWARD DOOLITTLE.

Witnesses:

JAMES SHEPARD, JoHN EDWARDS, Jr. 

